Related by context. Frequent words. (Click for all words.) 78 redshift 67 infrared wavelengths 67 GRBs 66 spectra 65 elliptical galaxies 65 globular clusters 64 quasars 64 brown dwarfs 63 X ray emission 62 galaxy clusters 61 super Earths 61 XMM Newton 61 galaxy cluster 61 galaxies 61 supernovae 60 distant galaxies 60 wavelengths 60 amplitudes 59 WMAP 59 planets orbiting 59 optical telescopes 59 Eta Carinae 59 gravitational lensing 59 HD #b [002] 59 spectroscopic 59 abundances 58 dwarf galaxies 58 brown dwarf 58 gamma ray bursts 58 extrasolar planets 58 exoplanets 58 terrestrial planets 58 quasar 58 interferometry 58 dwarf galaxy 57 distant galaxy 57 cosmic microwave background 57 pulsars 57 velocities 57 gravitational waves 57 rocky planets 56 ESO Very Large Telescope 56 orbits 56 planet orbiting 56 Milky Way Galaxy 55 spatial resolution 55 spiral galaxies 55 neutron stars 54 planets 54 celestial objects 54 neutrino 54 Milky Way galaxy 54 unaided eye 54 conductance 54 spiral galaxy 54 photometric 54 gamma ray burst 54 astrophysical 54 gamma rays 54 gamma ray 54 nebulae 54 Very Large Telescope 54 cosmic rays 54 exoplanet 54 supernova explosions 53 reflectance 53 radii 53 neutrinos 53 electron volts 53 laser pulses 53 interferometer 53 nuclei 53 photons 53 Orion Nebula 53 supernovas 53 luminosity 53 cosmic ray 53 X ray Observatory 52 hydrogen atom 52 nebula 52 astronomers 52 ejecta 52 extrasolar planet 52 astrophysicists 52 magnetization 52 magnetic fields 52 intensities 52 cosmological 52 WM Keck Observatory 52 spectroscopy 52 isotopic 51 neutron star 51 cosmologists 51 wavelength 51 photon 51 Large Magellanic Cloud 51 fainter 51 Saturn rings 51 superposition 51 supernova explosion 51 NASA Chandra